Presentation is loading. Please wait.

Presentation is loading. Please wait.

Control of bean thrips in navel oranges using ethyl formate fumigation for export to Australia Beth Mitcham, Veronique Bikoba Bill Biasi, and Francine.

Similar presentations


Presentation on theme: "Control of bean thrips in navel oranges using ethyl formate fumigation for export to Australia Beth Mitcham, Veronique Bikoba Bill Biasi, and Francine."— Presentation transcript:

1 Control of bean thrips in navel oranges using ethyl formate fumigation for export to Australia Beth Mitcham, Veronique Bikoba Bill Biasi, and Francine Pupin Department of Plant Sciences University of California, Davis Joseph Morse, UC Riverside In cooperation with: Kathie Blyskal and Alfred Hanson, Sunkist Growers The Linde Group

2 Ethyl Formate Natural plant volatile Registered for use in Australia and New Zealand by Linde Corporation as Vapormate TM in formulation with CO 2 Previously registered in US for control of insect pests in raisins, but registration expired in the 1980s Registration is being pursued by Linde Corporation

3 Laboratory System for Vapormate TM Fumigation

4 Laboratory Fumigation System

5 Mortality of Bean Thrips after 1 hour Vapormate TM Fumigation of Navel Oranges Lab Tests Treatment Rep Conc. EF (%) Untreated Control Vapormate 111.5% n =66 100% n = % n = % n = % n = % n = 320

6 Lab Test Methods 1 hour fumigation with 1% Vapormate at 50°F Evaluations: –Initial –after 3 wks 41°F –after 5 55°F –after 2 68°F

7 Laboratory Test

8 1=none; 2=very slight; 3= slight damage; 4= moderate damage Laboratory Test

9 No damage (1)Very slight damage (2) Slight damage (3)Moderate damage (4) Severe damage (5)Very severe damage (6)

10 Untreated ControlFumigate Before StorageFumigate After Storage Orange Cove/Sanger Navels-Lab Quality Evaluated after 3 41F plus 5 55F & 2 68F

11 Gillete Navels-Lab Quality Evaluated after 3 41F plus 5 55F & 2 68F Untreated ControlFumigate Before StorageFumigate After Storage

12 Harding & Legget Navels-Lab Quality Evaluated after 3 41F plus 5 55F & 2 68F Untreated ControlFumigate Before StorageFumigate After Storage

13 Small Degreening Rooms at Sunkist Growers

14

15 Semi-Commercial Test Method 1% Vapormate for 1 hour at 50°F Evaluations: –Initial –after 3 wks 41°F –after 5 55°F –after 2 68°F

16 Mortality of Bean Thrips after 1 hour Fumigation with Vapormate TM Sunkist Test Conc. EF (%) Untreated Control Vapormate 113.7% n = % n = 417

17 Sunkist Test

18 1=none; 2=very slight; 3= slight damage; 4= moderate damage

19 Untreated ControlFumigate Before StorageFumigate After Storage Villa Park – Semi-Commercial Test Quality Evaluated after 3 41F plus 5 55F & 2 68F

20 Untreated ControlFumigate Before StorageFumigate After Storage San Antonio – Semi-Commercial Test Quality Evaluated after 3 41F plus 5 55F & 2 68F

21 Untreated ControlFumigate Before StorageFumigate After Storage Golden Valley – Semi-Commercial Test Quality Evaluated after 3 41F plus 5 55F & 2 68F

22 Mandarin Lab Test Methods to Determine Fruit Tolerance 1 hour fumigation with 1.5% Vapormate at 50°F 8 replications of control and 16 replications for Vapormate trt. 3 weeks shelf life at 68°F with weekly visual evaluation

23 W. Murcott Mandarin Tolerance to Vapormate (1.5%)

24 Year 3 Commercial trials –Treat fruit in packed boxes with static fumigation in marine container –Confirm bean thrips mortality with large number of insects –Confirm fruit tolerance with many grower sources Develop mortality curves for adult bean thrips Prepare report for APHIS

25 Vapormate Delivery System

26 Potential for Vapormate Needs to be registered in U.S. or Needs to be approved for bean thrips control in Australia and New Zealand –Already registered there –Develop efficacy data for review –True of other alternative fumigants as well. GRAS compound Effective against Light Brown Apple Moth

27 EF concentration (%) Instar0.75%1.5%3.0% First Second Third Mature third Mortality of the California Red Scale (Aonidiella aurantii) 3 weeks after a 3-hour Fumigation with Ethyl Formate Y. Aharoni, Y. Nitzan, and A. Copel. (1987) Tropical Science (27)

28 Questions??


Download ppt "Control of bean thrips in navel oranges using ethyl formate fumigation for export to Australia Beth Mitcham, Veronique Bikoba Bill Biasi, and Francine."

Similar presentations


Ads by Google